package com.freeze;

//import cn.hutool.http.body.RequestBody;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import org.json.JSONObject;

import java.io.IOException;
import java.net.URLEncoder;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Base64;

public class TestPdf {

    public static final String API_KEY = "JWlcJTEGtOWv87GgNPYCoMWg";
    public static final String SECRET_KEY = "T3y3Oh2Krp3dvDvvbfBV9UoXjR4up6h4";

    static final OkHttpClient HTTP_CLIENT = new OkHttpClient().newBuilder().build();

    public static void main(String []args) throws IOException {
        MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");
        // pdf_file 可以通过 getFileContentAsBase64("C:\fakepath\1.pdf") 方法获取,如果Content-Type是application/x-www-form-urlencoded时,第二个参数传true

        String pdf_file = getFileContentAsBase64("E:\\test-ocr-0629\\src\\main\\resources\\pdf\\2.pdf",true);

        //RequestBody body = RequestBody.create(mediaType, "pdf_file="+pdf_file+"&detect_direction=false&paragraph=false&probability=false");

        int page = 2;
        RequestBody body = RequestBody.create(mediaType, "pdf_file="+pdf_file+"&detect_direction=false&paragraph=false&probability=false"+"&pdf_file_num="+page);


        Request request = new Request.Builder()
                .url("https://aip.baidubce.com/rest/2.0/ocr/v1/accurate_basic?access_token=" + getAccessToken())
                .method("POST", body)
                .addHeader("Content-Type", "application/x-www-form-urlencoded")
                .addHeader("Accept", "application/json")
                .build();
        Response response = HTTP_CLIENT.newCall(request).execute();
        System.out.println(response.body().string());

    }

    /**
     * 获取文件base64编码
     *
     * @param path      文件路径
     * @param urlEncode 如果Content-Type是application/x-www-form-urlencoded时,传true
     * @return base64编码信息，不带文件头
     * @throws IOException IO异常
     */
    static String getFileContentAsBase64(String path, boolean urlEncode) throws IOException {
        byte[] b = Files.readAllBytes(Paths.get(path));
        String base64 = Base64.getEncoder().encodeToString(b);
        if (urlEncode) {
            base64 = URLEncoder.encode(base64, "utf-8");
        }
        return base64;
    }


    /**
     * 从用户的AK，SK生成鉴权签名（Access Token）
     *
     * @return 鉴权签名（Access Token）
     * @throws IOException IO异常
     */
    static String getAccessToken() throws IOException {
        MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");
        RequestBody body = RequestBody.create(mediaType, "grant_type=client_credentials&client_id=" + API_KEY
                + "&client_secret=" + SECRET_KEY);
        Request request = new Request.Builder()
                .url("https://aip.baidubce.com/oauth/2.0/token")
                .method("POST", body)
                .addHeader("Content-Type", "application/x-www-form-urlencoded")
                .build();
        Response response = HTTP_CLIENT.newCall(request).execute();
        return new JSONObject(response.body().string()).getString("access_token");
    }
}
